Local permit directory · Virginia

Fairfax County, Virginia Permit Guide

Find Fairfax County, Virginia permit offices, local planning notes, application documents, and inspection questions in one guide.

Published by Quantum Steel Design LLC. Editorial methods and source-review scope.

Individual permit guides for Fairfax County

Start with jurisdiction and project scope

Before applying in Fairfax County, confirm whether the property is within city limits or in unincorporated county territory. Describe the complete work to the office serving that parcel, including electrical, plumbing, structural, and site changes. Building, zoning, utility, and private HOA approvals can be separate.

Open the local official sources or prepare a project checklist.

Source availability audit: . This checks links, not every local rule. These compiled notes are starting points; confirm current dimensions, exemptions, fees, and adopted codes with the cited offices.

Residential Permit Library

Fairfax County uses its PLUS system and permit library to route residential building, site, electrical, mechanical, plumbing, solar, demolition, and retaining wall records.

Permit and scope questions

Fairfax County describes applications in PLUS as records, and Land Development Services issues applicable site and building permits after the correct record type is selected.

Zoning and placement

Some projects require site or grading review in addition to building review, especially when land disturbance, retaining walls, or new detached structures are involved.

Building and trade review

The residential permit library separates new buildings, additions and alterations, miscellaneous work, retaining walls, demolition, trades, and solar into different record types.

Discuss your project early when: Call before applying if you are unsure which PLUS record fits the project, if the property is in an incorporated town, or if grading, demolition, or trade permits may be involved.

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Addition, Deck, and Basement Permits

Fairfax County treats residential decks, finished basements, renovations, and additions as addition/alteration records for eligible one- and two-family dwellings and townhouses.

Permit and scope questions

Residential additions and alterations include renovations, decks, finished basements, and more, and are submitted online in PLUS under the Building tab.

Zoning and placement

Land disturbance can trigger an associated grading plan, so outdoor additions and decks should be checked for grading requirements before submission.

Building and trade review

Fairfax County separates work types such as additional square footage, interior alterations, and combined exterior-interior alterations during the application process.

Discuss your project early when: Call before applying if the project adds square footage, includes a deck or screened porch, changes structure, finishes a basement, or may disturb enough land to need grading review.

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Shed, Solar, and Trade Permits

Fairfax County requires specific residential record types for larger sheds, solar installations, electrical work, HVAC work, plumbing work, and related child trade permits.

Permit and scope questions

For Fairfax County, ask the permit office to confirm the current area limit and the method used to measure it; how structure use, attachment and utilities affect any accessory-building exemption; and the solar mounting arrangement, electrical scope and accepted review route before treating this project as exempt or permit-required.

Zoning and placement

Detached structures and ground-mounted equipment can require site review, and incorporated towns such as Vienna or Clifton may require separate town approvals for some work.

Building and trade review

Associated trade permits can be linked to a parent building permit, and Fairfax notes that electrical and plumbing permits can be obtained after the building permit is issued.

Discuss your project early when: Contact Fairfax County before ordering materials or starting work to resolve the current area limit and the method used to measure it; how structure use, attachment and utilities affect any accessory-building exemption; the solar mounting arrangement, electrical scope and accepted review route; and the charger type, new circuit work and allowed equipment locations. Bring the proposed dimensions, location and scope so the answer is tied to the project.

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Prepare a complete application conversation

Bring enough detail for staff to identify the correct application. Ask which plans need dimensions or a professional seal, how files should be named, and whether other departments must approve the proposal first.

Inspection planning

Questions to resolve before work starts

Official source directory

If an official link is unavailable or redirects to a general page, use that government's site search or contact its permit office. Some government sites restrict automated access; that does not establish that a page is missing.

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